#menu {
	width:200px;
	/*border:1px solid red;*/
}
#menu ul {
	list-style: none;
	padding: 0px;
	margin: 0px;
}
#menu ul li {
	border-bottom: 1px solid #fff;

}
#menu ul li a {
	/*先将a标签转换为块级元素，才能设置宽和内间距*/
	display: block;
	background-color: #00a6ac;
	color: #fff;
	padding: 5px;
	text-decoration: none;
}
#menu ul li a:hover {
	background-color: #008792;
}
